DL 9964 then DL 525 at Atlanta
Grand Rapids → Atlanta → New York LaGuardia
Timetable, Atlanta time
18:19DL 9964 from Grand Rapids at the gate
12:30DL 525 to New York LaGuardia leaves the gate
18 h 11 apart on the timetable, overnight
DL 525 leaves 18 h 11 after DL 9964 arrives on the timetable: more than half a day, so not a connection we count.